Direct observation of mode selective electron-phonon coupling in suspended carbon nanotubes

被引：59

作者：

Bushmaker, Adam W. ^{[1
]}

Deshpande, Vikram V. ^{[2
]}

Bockrath, Marc W. ^{[2
]}

Cronin, Stephen B. ^{[1
]}

机构：

[1] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA

[2] CALTECH, Pasadena, CA 91125 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 12期

关键词：

D O I：

10.1021/nl071840f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Raman spectra of individual pristine suspended single-walled carbon nanotubes are observed under high electrical bias. The LO and TO modes of the G band behave differently with respect to voltage bias, indicating preferential electron-phonon coupling and nonequilibrium phonon populations, which cause negative differential conductance in suspended devices. By correlating the electron resistivity to the optically measured phonon population, the data are fit using a Landauer model to determine the key scattering parameters.

引用

页码：3618 / 3622

页数：5

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